{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-107889 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-107889 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-107889 is a medium-severity cross-site scripting vulnerability in Red Hat Build of Keycloak, published on 9 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-107889 and fix it if it is affected.\n\nWhat it is: CVE-2026-107889 is a medium-severity cross-site scripting vulnerability in Red Hat Build of Keycloak, published on 9 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-107889 in the wild and no public exploit code.\n\nAffected product: Red Hat Build of Keycloak. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-107889/ (Markdown: https://insights.sbomify.com/CVE-2026-107889/index.md)","id":"CVE-2026-107889","markdown":"https://insights.sbomify.com/CVE-2026-107889/index.md","name":"CVE-2026-107889","record":{"aliases":["GHSA-gv8g-wx99-6r59"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["data_read","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Keycloak identity server","requires_auth":"high_privilege","summary":"A stored XSS vulnerability in Keycloak's login page allows realm administrators to inject malicious scripts, potentially compromising user sessions and data.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":5.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"A flaw was found in the login theme rendering component of Keycloak. The issue occurs because the security filter responsible for cleaning user input can be bypassed, allowing a realm administrator to store malicious scripts in display fields. This could result in unauthorized JavaScript execution in the browsers of users visiting the login page, potentially leading to data exposure or session interference.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Keycloak-services: keycloak-services: stored xss on login page via kcsanitize bypass","id":"CVE-2026-107889","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Null dereference in CUPS","id":"CVE-2026-107890"},"packages":[],"prev":{"headline":"Null dereference in CUPS","id":"CVE-2026-107888"},"products":["Red Hat Build of Keycloak","Red Hat Single Sign-On 7"],"published":"2026-10-09","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-13","vendors":["Red Hat"]},"summary":"A stored XSS vulnerability in Keycloak's login page allows realm administrators to inject malicious scripts, potentially compromising user sessions and data.","url":"https://insights.sbomify.com/CVE-2026-107889/"}